Started to mention the EasyDoc Converter "app" since I hadn't seen anything about it here. But this Macworld article, by Mr. Glenn Fleishman, who has proven to be trustworthy and well-informed, has a lot of useful info and some great recommendations (since they agree with mine... mostly ;) ).
<How to avoid Mac malware by using Gatekeeper and common sense (http://www.macworld.com/article/3093478/os-x/how-to-avoid-mac-malware-by-using-gatekeeper-and-common-sense.html?token=%23tk.MCW_nlt_mw_macweek_html_2016-07-13&idg_eid=e2f8e7c7927c234f46c2ea4e27cd393d&utm_source=Sailthru&utm_medium=email&utm_campaign=MacWeek%202016-07-13&utm_term=mw_macweek_html#tk.MW_nlt_mw_macweek_html_2016-07-13)>
"Common Sense?!" What'll they think of next?! [banghead] [lol]